Buick Cascada 2016-2019 Drivetrain Bolt Torque Specifications & Fastener Values
Buick Cascada 2016-2019

Buick Cascada 2016-2019 Drivetrain Bolt Torque Specifications

Detailed torque specifications for various drivetrain bolts on the 2016-2019 Buick Cascada. This includes transmission, differential, driveshaft, and axle components.

Updated

Important Information

Safety guidelines and reference information for proper torque application

Quick Reference Guide
ft-lbs → Nm
× 1.356
ft-lbs → kg-m
× 0.138
Nm → ft-lbs
× 0.738
in-lbs → ft-lbs
× 0.083

Common Torque Patterns

Star Pattern

Used for wheels and other circular bolt patterns

Star Pattern torque pattern diagram showing proper bolt tightening sequence
Cross Pattern

Used for gaskets and cover plates

Cross Pattern torque pattern diagram showing proper bolt tightening sequence
Sequential Pattern

Used for head bolts and other critical components

Sequential Pattern torque pattern diagram showing proper bolt tightening sequence

Common Mistakes to Avoid

Over-tightening

Exceeding the specified torque value can stretch or break fasteners, damage threads, or crack components.

Prevention:

Always use a calibrated torque wrench and follow specifications exactly.

Incorrect Torque Sequence

Tightening bolts in the wrong order can cause uneven pressure distribution and potential leaks or damage.

Prevention:

Follow the manufacturer's specified torque sequence pattern.

Dirty Threads

Dirt, rust, or old thread locker can affect torque readings and proper fastener tension.

Prevention:

Clean and inspect all threads before assembly. Use new thread locker if specified.

Reusing TTY Bolts

Torque-to-yield bolts are designed to stretch and must not be reused.

Prevention:

Always replace TTY bolts with new ones. They are single-use only.

Dry vs. Lubricated

Not accounting for whether torque specs are for dry or lubricated fasteners can lead to incorrect tension.

Prevention:

Check if specs are for dry or lubricated threads. Use specified lubricant when required.

Recommended Tools

Torque Wrench (1/4" Drive)

Range: 2-25 ft-lbs
Small fasteners, delicate components

Torque Wrench (3/8" Drive)

Range: 10-100 ft-lbs
Most common automotive fasteners

Torque Wrench (1/2" Drive)

Range: 30-250 ft-lbs
Large fasteners, wheels

Angle Gauge

Torque-to-yield (TTY) bolts

Torque Wrench Care

  • Calibrate annually or after 5,000 clicks
  • Store at lowest setting
  • Keep clean and lubricated

Search Specifications

Search by component name, bolt size, or description

Torque Calculator

Convert between different torque units

Flywheel

Components related to securing the flywheel to the engine crankshaft.

1

Flywheel Bolts

M10 x 1.25
Torque Value
59 ft-lbs (80 N·m)
Important Notes
Ensure even clamping force. Use new bolts if recommended by the service manual.

Transmission Mounting

Components related to mounting the transmission to the engine or chassis.

1

Transmission Mounting Bolts (to engine)

M12 x 1.75
Torque Value
44 ft-lbs (60 N·m)
Important Notes
Check for proper alignment before tightening. Use new bolts if recommended.
2

Transmission Mount Bolt (to frame)

M12 x 1.75
Torque Value
44 ft-lbs (60 N·m)
Important Notes
Ensure mount is properly seated.

Transmission Internals

Components located inside the transmission case.

1

Output Shaft Nut/Bolt (Transmission)

M14 x 1.5
Torque Value
52 ft-lbs (70 N·m)
Important Notes
Ensure proper shaft alignment. Use new bolt or nut if required.
2

Output shaft flange to transmission bolts

M10 x 1.5
Torque Value
37 ft-lbs (50 N·m)
Important Notes
Tighten in a cross pattern.

Transmission Exterior

Components located on the outside of the transmission case.

1

Transmission Oil Pan Bolts

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Tighten in a cross pattern to ensure even pressure on the gasket. Do not over-torque.
2

Transmission Drain and Fill Plugs

M18 x 1.5
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Use new sealing washers if required. Do not over-torque.

Drive Axles

Components related to the drive axles/half shafts.

1

Drive Axle/Half Shaft Bolts (Inner CV Joint Flange)

M10 x 1.25
Torque Value
52 ft-lbs (70 N·m)
Important Notes
Tighten evenly, use new bolts if required.
2

CV Joint/Axle Nut (Hub End)

M24 x 1.5
Torque Value
118 ft-lbs (160 N·m)
Important Notes
Some applications may require a specific tightening procedure.

Driveshaft

Components related to the driveshaft.

1

Propeller/Drive Shaft Bolts

M10 x 1.25
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Ensure proper alignment, use new bolts if required. This does not apply to FWD models.
2

Axle Support Bearing Bolts (If Applicable)

M10 x 1.5
Torque Value
37 ft-lbs (50 N·m)
Important Notes
Make sure the support bearing is properly aligned. Only on applicable models.

Differential

Components related to the differential assembly.

1

Differential Ring Gear Bolts

M12 x 1.5
Torque Value
70 ft-lbs (95 N·m)
Important Notes
Apply thread locker if specified. Use a cross pattern for even tightening. This does not apply to FWD models.
2

Differential Case/Carrier Bolts

M12 x 1.75
Torque Value
60 ft-lbs (80 N·m)
Important Notes
Ensure proper alignment of the case and housing. This does not apply to FWD models.
3

Differential Drain/Fill Plug

M18 x 1.5
Torque Value
30 ft-lbs (40 N·m)
Important Notes
Use new sealing washers if required. Do not over-torque. This does not apply to FWD models.

Transfer Case

Components related to the transfer case assembly.

1

Transfer Case Drain/Fill Plug

M18 x 1.5
Torque Value
30 ft-lbs (40 N·m)
Important Notes
Use new sealing washers if required. Do not over-torque. Only on applicable models.

Final Drive

Components related to the final drive housing on applicable vehicles.

1

Final Drive Housing Bolts (If Applicable)

M12 x 1.75
Torque Value
44 ft-lbs (60 N·m)
Important Notes
Ensure proper alignment of the housing and the mount. Only on applicable models.

Troubleshooting Guide

Common issues, diagnostic steps, and prevention guidelines

Common Issues

Bolt stretching, stripped threads, uneven torque patterns

Loose Components

Symptoms:
  • Rattling or vibration noises
  • Visible movement in components
  • Uneven panel gaps
Solutions:
  • Clean threads and mounting surfaces
  • Replace damaged fasteners
  • Apply proper torque in sequence
  • Use thread locker if specified

Stripped Fasteners

Symptoms:
  • Unable to achieve proper torque
  • Fastener spins freely
  • Visible thread damage
Solutions:
  • Use thread repair kit if appropriate
  • Install thread insert (HeliCoil)
  • Replace component if threaded hole is damaged
  • Upgrade to higher grade fastener if recommended

Overtightened Components

Symptoms:
  • Cracked or deformed parts
  • Broken fasteners
  • Compressed gaskets or seals
Solutions:
  • Replace damaged components
  • Use new fasteners
  • Follow proper torque sequence
  • Verify correct torque specifications

Diagnostic Steps

Visual inspection, torque verification, thread assessment

1

Visual Inspection

Inspect the affected area for any visible signs of damage or wear

  • Check for cracks or deformation
  • Look for signs of excessive wear
  • Verify proper fastener installation
2

Torque Verification

Verify the torque applied to the fasteners

  • Check the torque wrench calibration
  • Verify the torque specification
  • Compare the applied torque to the specification
3

Thread Assessment

Assess the condition of the threads

  • Check for signs of thread damage
  • Verify the thread type and size
  • Check for proper thread engagement

Prevention Guidelines

Best practices, maintenance tips, tool care

Best Practices

  • Always follow the recommended torque specification
  • Use the correct type and size of fasteners
  • Verify the torque wrench calibration regularly

Maintenance Tips

  • Regularly inspect the affected area for signs of wear or damage
  • Replace damaged or worn-out components promptly
  • Keep the work area clean and organized

Tool Care

  • Regularly clean and maintain the torque wrench
  • Store the torque wrench in a dry and secure location
  • Verify the torque wrench calibration before each use

Frequently Asked Questions

Find answers to common questions about torque specifications

Q1

Why are correct torque specifications important for drivetrain bolts?

Using the correct torque ensures proper clamping force, preventing bolts from loosening due to vibration and stress. Under-torquing can lead to parts becoming loose, while over-torquing can damage threads or the component itself, potentially causing catastrophic failure. For instance, over-torquing a driveshaft bolt can stretch it, making it prone to snapping under load.

Q2

What happens if I don't have a torque wrench?

While a torque wrench is highly recommended, if you absolutely do not have one, it is better to hand-tighten the bolts and then take it to a professional shop to have the fasteners torqued correctly with a torque wrench. Attempting to estimate the torque by hand can lead to damage and unsafe driving conditions.

Q3

How often should I check the torque on my drivetrain bolts?

It's good practice to check drivetrain bolt torque after any major service involving the drivetrain, such as replacing a driveshaft, transmission work, or after significant driving on rough roads. A good practice is to check them after about 500 miles after any major work. For regular maintenance, checking during your 6-month or yearly maintenance intervals is a good practice.

Q4

Can I reuse drivetrain bolts?

It depends on the specific bolt. Some bolts, especially torque-to-yield (TTY) bolts found in some drivetrain components, are designed for one-time use and must be replaced. Always consult the service manual for the specific bolt in question. For non-TTY bolts, inspect for damage or deformation before reusing. A bolt that has been previously over-torqued should be replaced even if it is not intended as a TTY bolt.

Q5

Do I need thread locker on drivetrain bolts?

Yes, thread locker is recommended on many drivetrain bolts. If the service manual states thread locker, use it! It helps prevent loosening due to vibrations. Ensure you use the correct type and torque settings for bolts with thread locker as it affects the clamping force.

Environmental Considerations

Temperature, humidity, and seasonal effects on torque specifications

Temperature Effects

Includes: High Heat, Cold Weather, Thermal Cycling

Temperature can significantly impact torque values and fastener behavior

Cold Weather

Effects:
  • Increased material brittleness
  • Higher torque required due to thread contraction
  • Reduced thread lubricant effectiveness
Recommendations:
  • Allow components to warm to room temperature when possible
  • Consider using winter-grade thread lubricants
  • Check torque values more frequently during winter months

Hot Weather

Effects:
  • Thermal expansion of components
  • Decreased friction in threads
  • Accelerated lubricant breakdown
Recommendations:
  • Check torque when components are at normal operating temperature
  • Use temperature-resistant thread lockers
  • Consider re-torquing after heat cycles

Humidity and Corrosion

Covers: Rust Prevention, Salt Exposure, Moisture Control

Moisture and corrosion can affect fastener integrity and torque values

High Humidity

Effects:
  • Accelerated corrosion formation
  • Reduced friction coefficient
  • Potential thread seizing
Prevention:
  • Use corrosion-resistant fasteners
  • Apply appropriate anti-seize compounds
  • Maintain proper protective coatings

Salt Exposure

Effects:
  • Rapid corrosion development
  • Thread damage
  • Seized fasteners
Prevention:
  • Regular underbody washing
  • Use of sacrificial anodes where appropriate
  • Application of protective coatings

Seasonal Maintenance

Spring, Summer, Fall, and Winter maintenance schedules

Spring

  • Inspect for winter damage
  • Clean and protect exposed fasteners
  • Check torque on critical components

Summer

  • Monitor heat-affected components
  • Check expansion-related loosening
  • Inspect cooling system mounts

Fall

  • Prepare for winter conditions
  • Apply corrosion protection
  • Verify all fasteners are properly torqued

Winter

  • More frequent inspection of critical fasteners
  • Check for salt damage
  • Monitor suspension component torque

Related Resources

Tools, service procedures, and technical bulletins

Recommended Tools

Torque Wrench (1/2" Drive)

A calibrated torque wrench with a 1/2" drive is essential for accurately tightening bolts to specified torque values.

  • Wide torque range (e.g., 20-250 ft-lbs)
  • Click-type or digital display for accuracy
  • Durable construction
Learn more

Torque Wrench (3/8" Drive)

A 3/8" drive torque wrench is useful for accessing bolts in tighter areas and for lower torque applications.

  • Lower torque range (e.g., 5-80 ft-lbs)
  • Click-type or digital display for accuracy
  • Compact design
Learn more

Socket Set (Metric)

A comprehensive metric socket set is needed for various bolt sizes found within the drivetrain.

  • Standard and deep sockets
  • Common sizes (e.g., 10mm, 13mm, 15mm, 18mm)
  • 6-point design for better grip
Learn more

Extension Bars

Extension bars of various lengths help reach recessed bolts and components.

  • 1/2" and 3/8" drive compatible
  • Various lengths (e.g., 3", 6", 10")
  • Durable steel construction
Learn more

Universal Joint Adapter

A universal joint adapter can be useful when dealing with bolts at an angle.

  • 1/2" and 3/8" drive compatible
  • Allows access to bolts at angles
  • Durable steel construction
Learn more
Service Procedures

Driveshaft Bolt Torque Check

Procedure for inspecting and tightening driveshaft bolts to specified torque to ensure proper driveline function.

  • Locate the driveshaft bolts.
  • Using the appropriate socket, loosen each bolt slightly.
  • Using the torque wrench set to the manufacturer's specified torque, tighten each bolt in a star pattern.
  • Recheck each bolt to ensure proper tightness.
View full procedure

Transmission Mount Bolt Torque Check

Procedure for checking and tightening the transmission mount bolts to the specified torque.

  • Locate the transmission mount bolts.
  • Using the appropriate socket, slightly loosen the bolts.
  • Tighten the bolts using the torque wrench to the manufacturer’s specified torque.
  • Verify proper torque on each bolt.
View full procedure

Axle Nut Torque Check

Procedure for inspecting and tightening the front axle nuts to the specified torque.

  • Locate the front axle nut(s).
  • Using a socket loosen the nuts slightly.
  • Using a torque wrench, tighten each axle nut to the specified torque.
  • Verify proper torque.
  • If applicable, use a new cotter pin to secure the nut.
View full procedure

Differential Mount Bolt Torque Check

Procedure for checking and tightening the bolts securing the differential to the chassis

  • Locate the differential mounting bolts.
  • Using the appropriate socket, slightly loosen the bolts.
  • Tighten bolts using a torque wrench to the manufacturer’s specifications.
  • Recheck torque to verify tightness.
View full procedure
Technical Service Bulletins

Driveshaft Bolt Loosening Issue

2017-06-15

Some 2016-2017 Cascada models have experienced driveshaft bolt loosening, causing noise and vibration. This bulletin provides revised torque specifications and bolt checking procedures.

2016-2017

Resolution: Inspect driveshaft bolts and tighten to 55 Nm + 90 degrees using new bolts. Recheck after 500 miles.

Transmission Mount Bolt Failure

2018-03-22

Reports have surfaced of transmission mount bolts failing due to fatigue. This bulletin details new higher strength replacement bolts and their torque specifications.

2017-2019

Resolution: Replace transmission mount bolts with updated higher strength bolts, torqued to 80 Nm.

Axle Nut Noise and Vibration

2019-01-10

A noise and vibration issue has been traced back to improperly torqued or reused axle nuts. This bulletin details the correct torque specification for all applicable vehicles.

2016-2019

Resolution: Tighten the axle nut to 200 Nm and use a new cotter pin or lock plate.

About the Author

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Alan Montanye - Automotive Technical Specialist
ASE

Alan Montanye

Automotive Technical Specialist

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